Re: [Visualpython-users] VPython 6.02 with buttons, sliders, and new event handling capabilities

[Steve S. <st...@sp...>]

Hmm.. I've never hit that one.

I haven't experimented with linking to dylibs for boost, so I'm probably not going to be much help there.

Maybe Bruce will know if that's been tried.

sorry!
-steve

On Feb 13, 2013, at 9:43 PM, boy...@gm... wrote:

> Hello Steve,
> 
> I did read that, but I have't tried yet. I'm interested in trying to install boost with homebrew.
> 
> I made a few changes with the boost installation complied by homebrew (I not do their basic install for 10.8. Before I had chosen some options that I didn't really need).
> 
> The strange c++ error has gone. Instead 'import visual' generated the following Fatal error:
> 
> Fatal Python error: PyThreadState_Get: no current thread
> Abort trap: 6
> 
> Do you think this could be because I linked with the dylibs. I remember when I did some ctypes work with python on OSX that there was a problem importing dylib files that gave a similar error.
> 
> Best wishes,
> 
> Dan
> 
> 
> On 13 Feb 2013, at 22:42, Steve Spicklemire <st...@sp...> wrote:
> 
>> Hi Dan,
>> 
>> When you built boost did you use the bootstrap/b2 parameters suggest in MAC-OSX.txt or some variation?
>> 
>> I think __ZN5boost6python7objects15function_objectERKNS1_11py_functionERKSt4pairIPKNS0_6detail7keywordES9_E is a c++ mangled name for some specific method, but it's not included in your library somehow. 
>> 
>> -steve
>> 
>> On Feb 13, 2013, at 6:18 AM, "boy...@gm..." <boy...@gm...> wrote:
>> 
>>> Hello Steve, Tom,
>>> 
>>> find /usr/local/lib -name *boost_python* -ls reveals that there is a .dylib and .a versions, symlinked to /usr/local/lib,
>>> 
>>> /usr/local/lib/libboost_python-mt.a -> ../Cellar/boost/1.52.0/lib/libboost_python-mt.a
>>> /usr/local/lib/libboost_python-mt.dylib -> ../Cellar/boost/1.52.0/lib/libboost_python-mt.dylib
>>> 
>>> So Tom suggestion was right, the libraries have a "-mt" appended.
>>> 
>>> I changed line 135 of setup.py to read,
>>> 
>>> libraries = ['boost_python-mt','boost_signals-mt'] 
>>> 
>>> I re-built. This time the build finishes successfully, but there is error when import visual in python:
>>> 
>>> ----------------------------------
>>> File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/VPython-6.02-py2.7-macosx-10.8-x86_64.egg/visual/__init__.py", line 33, in <module>
>>>  from visual.visual_all import * # this statement not included in vis/__init__.py
>>> File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/VPython-6.02-py2.7-macosx-10.8-x86_64.egg/visual/visual_all.py", line 10, in <module>
>>>  from visual_common.cvisual import vector
>>> ImportError: dlopen(/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/VPython-6.02-py2.7-macosx-10.8-x86_64.egg/visual_common/cvisual.so, 2): Symbol not found: __ZN5boost6python7objects15function_objectERKNS1_11py_functionERKSt4pairIPKNS0_6detail7keywordES9_E
>>> Referenced from: /usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/VPython-6.02-py2.7-macosx-10.8-x86_64.egg/visual_common/cvisual.so
>>> Expected in: flat namespace
>>> in /usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/VPython-6.02-py2.7-macosx-10.8-x86_64.egg/visual_common/cvisual.so
>>> ---------------------------------
>>> 
>>> I think the function named "__ZN5boost6python7objects15function_objectERKNS1_11py_functionERKSt4pairIPKNS0_6detail7keywordES9_E" is a hint that headers didn't get processed or some obscure problem with building against a dynamic library (the .dylib) files.
>>> 
>>> Any suggestions? 
>>> 
>>> The includes directory has the following structure,
>>> 
>>> /usr/local/include/boost/<all boost files and folders>
>>> 
>>> Should I specify the boost subdirectory as,
>>> 
>>> [build_ext]
>>> include-dirs=/usr/local/include/boost <---- ?
>>> library-dirs=/usr/local/lib
>>> 
>>> Should I only link against the static library (is that what the .a files are?). If so, how to do that?
>>> 
>>> Best wishes,
>>> 
>>> Dan
>>> 
>>> PS. I should probably say, this is a fresh install of 10.8.2, with a latest Xcode (4.6), and latest homebrew (0.9.4, completely up-to-date).
>>> 
>> 
> 
> 
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